Detachable gripper for printing-machines



(No Model.)

J. T. HAWKINS.

DBTAGHABLB GRIPPBR FOR PRINTING MACHINES.

Patented Mar. 22, 1887.

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UNITED STATES PATaNT .Trina JOHN T. HAVKINS, OF TAUNTON, MASSACHUSETTS.

DETACHABLE GRIPPER FOR PFliNTlNG-MACl-HNES.

SPECIFICATION forming part of Letters Patent No. 359,86, dated March 22, 1857.

Application filed January 7,1887. Serial No. 223.693. (No niodeLl To @ZZ whom, 'it may concern:

Beit known that I, JOHN T. HAWKTNS, of Taunton, in the county 0i' Bristol and State of Massachusetts, have invented a new and useful Detachable Gripper forPrinting-Machines, which invention is fully set forth and illustrated in the following specifica-tion and accompanying drawings.

The object of this invention is to provide a gripper which may be readily detachable from its shalt without the necessity for removing the said shaft from its bearings, to avoid the use o'f setscrews inipinging upon, and thereby marring said shaft, and to have the clampingscrew in such posit-ion as to be most readily accessible through the usual gaps in printingpress cylindcrs,within which the gripper-shaft oscillates.

The invention will first be described, and then particularly set forth in the claim.

In the accompanying drawings, Figure l is a side elevation, and Fig. 2 a plan, illustrating the grippers forming the subject of this invention.

In said figures the gripper is shown iu two pieces, one of which, l, is extended into a tongue or point, 2, its other end being forined into a grooved hook, 8. The other part of the gripper constitutes a cap, Li, one end of which iits like a tenon or tongue into the groove 3, its other end having a hole bored for the reception of .the screw 5, which screwr is threaded and enters a hole correspondingly tapped out to receiveitin the part 1. A space, 6, is leftbetwcen the two parts l and 1i on that side of the shaft at which the screw 5 acts to clamp the gripper on the shaft. By said action ot the screw 5 the two parts of the gripper are drawn together, as in the well-known split solid socket. The dotted lines 7 show one form of gapof a printing-press cylinder, within which the gripper-shaft 9 oscillates, and said lines illustrate how the position in the gripper given to the clamping-screw 5 is rendered more accessible for manipulation than if placed on the opposi/te side ol` the grippershai't.

lt is obvious that the tongue 2 may be made a part of the cap 4 instead of a part of the lower part l, as shown in dotted lines S, without departing from the gist oi' this invention, and in some eases it may be found desirable to do so.

heretofore been suggested, as shown in Patent No. 274,5l6, of March 27, 1883, and also others, in which a set-screw impinges upon the shaft and in which the clamping action of the wellknown split solid socket is not had. As such constructions mar the shalt in the same way as the ordinary solid gripper does, by means of a setscrew iinpinging upon and thereby biting into or otherwise inarring the shaft it will be seen that one great object of this invention is secured by its providing as effective a clamping action as that of the well-known non -detachable split solid socket, while at the same time securing facile detachability.

Having thus fully described my said iinproved construction as oi' my invention, I claim- A Adetachable gripper consisting oltwo parts, as l and 4, upon one of which the tongue or point oi' the gripper is formed, engaging each other at one. side of the shaft bya groove-andtenou joint, and adjusted to clamp the shaft by means of a space left between them, as at 6, and a screw, as 5, at the opposite side of said shaft, whereby said parts are drawn together on one side, and said gripper is securely clamped on the shaft by a clamping-screw without marring the same by a. set-screw point, and is readily detached from said shaft, While the clanipingscrew is mostaccessibly placed for adjustment or removal, substantially as and for the purposes set forth.

JOHN T. HAVKINS. lVitnesses:

ELisHa T. JACKSON, ALBERT J. PARK.

I am aware that detachable grippers have 

